Liquid fuel burner and pilot structure



Jan 25 1949' v M. D. HusToN ErAL' LIQUID FUEL BURNER AND PILOT STRUCTUREv 2 Sheets-Sheet 1 Filed sept. 2s, 1944.

Null! 4 seoeeeeeoeeooa/boeooaoooo wie? M. D. HUSTON ET AL LIQUID FUEL BURNER AND PILOT STRUCTURE Jan. 25, 1949.

2 Sheets-Sheet 2 FiledY sept. 28, ,1944

Patented Jan. 25, 1949 UNITED [STATES PATENT OFFICE LIQUID FUEL BURNER AND PILOT STRUCTURE Milton D. Huston and Bruce Harter, Santa Fe,

N. Mex., asignan, by mesne Breese Burners, Inc., Santa Fe, N. Mex., a poration o! Delaware assignments, to l cor- ` Applieemen september 2s, 1944, seem Ne. xsane 8 Claims. (Cl. 158-91) l Our invention relates to an improvement in Pilot devices for ,pot type burners. It has for one purpose to provide an improved device for maintaining a low or pilot ilamein a Dot type Vburner during periods when -the heating demand Another purpose is to provide. a pilot attach` ment or structure lor pot type burners which provides silent combustion:

Another purpose is to provide a pilot structure for pot type burners which operates with a minimum of free carbon deposit.

Other purposeswill appear from time to time in the course of the specication.

We illustrate our invention more or less diao Y z l derstood that the volume or rate oi flow oi fuel admitted along the fuel pipe I0 may be manual- 'ly or thermostatically controlled to provide a re1- atively small iiow loi fuel at the pilot stage and a larger ilow of fuel when the heating demand rises.

'lhe upper space within the housing l above the ring l serves as a combustion chamber. The

open top of the pot 1 may .be .partially closed'by any suitable llame ring, Il, with va central aperture I2. The wall oi the pot 'l is provided with A a plurality 'of primary air inlet apertures I3, lo-

cated at various levels, the lowest row being shown as downwardly tilted. Anysuitable means may be employed for admitting secondary air at or adjacent the top of .the pot. We illustrate for example a row' of secondary air inlets il, which are more closelyspaced than the inlets I 3 and grammatically in the accompanying drawings wherein: v Figure 1 'is a vertical axial section;

Figure 2 is a section on the line 2-2 of Figure 1;

Figure 3 is a section on the line 3-3 of Figuro 1;`

Figure 4 is a similar section through a variant form oi the device; y

Figure 5 is a section on the line-5 5 of Figuro Figure 6 is a section on the line `6-6 oi Figuro 5.

Like parts are indicated by like characters throughout the speciilcation and drawings.

Referring .to the drawings, l indicates any suitable heater outer housing or drum, herein illustrated as being mounted on legs 2, which provide air inlet spaces 3. 4 is a bottompartition having a central air inlet aperture 5 whereby the atmospheric air which passes through the spaces 3 mayenter the space within the housing. 6 is a supporting angle ring mounted intermediate top` preferably upwardly tilted.

It 'will be understood that the entire fuel supply may be delivered to the bottom 9 oi' the pot along the pipe I0. Surrounding the area of admission of the fuel, we provide a pilot piece which includes a pair of generally radialinwardly converging vertical walls It, the inner edges of which deilne, at the bottom, a liquid fuel inlet space or aperture Il. The walls may also be connected by an intermediate arcuate vertical partition I8 provided with an upper aperture I9. 20 indicates a spacer or support for the lower edge of the wall I8 adapted to keep the space I1 open for the passage of unvaporized liquid fuelfrom the space within the pilot piece to the interior'of the pot.

22 is any suitable top plate or cover for the pilot piece. The pilot piece may be held in position forl example by a pin 23, supporting a ring segment 24, the ends vof which are secured to the pilot piece as at 25. It will -be noted that the plate 22 is located at a level above the lowest row of primary air inlet apertures so that air is admittedthrough the wall of the pot 'l into the interior of the pilot piece. e

With references to Figures 4 'to 6 inclusive, we*

may substitute, for the converging walls I6, a single vertical wall 30 apertured to provide leakage space or spaces 3| at its lower edge, the upper central aperture 32 and the top plate 33 located above the lowest ofthe primary air inlet apertures il. 34 is an annular or segmental connecting and supporting element which rests upon the supporting pin 3l.

It will beunderstood as to both forms of the device that additional spacing pins 36 or 36a may be employed in orderto positionand support the pilot piece in proper relation to the 'liquid fuel inlet duct I0. J

It will be realized that. whereas we have 'described and illustrated a practical and operative device. nevertheless many changes may be made in the size, shape, number and disposition of parts withoutdeparting materially from .the spirit of our invention. We therefore wish that the description and drawings be taken as in a broad v sense illustrative or diagrammatic, rather than as a imitation to our precise showing.

We claim:

1. In combination, an open topped burner pot y having a closed bottom, a circumferential wall provided with a pluralltyoi' primary air inlet the flow of name and liquid fuel respectively from the interiorof the pilot housing to the interior of the pot.

4. In combination, an open topped burner pot for liquid fuel, having a circumferential wall pro- .f'vided with a plurality of primary air inlet apermary' air and vaporized fuel formed inthe pot,

apertures located at various levels in the wall,

means for delivering secondary air to the mixture of primary air and vaporized fuelformed in the pot. and a pilot housing dening and surrounding a space in communication with a plurality of the bottomgadapted to permit the flow of name and liquid fuel respectively from the interior of the housing to the interior of the pot.

2. In combination, an open topped burner pot having-'ua closed bottom, a circumferential wall provided with a plurality of primary air inlet apertures located at various' levels in the wall, means for delivering secondary air to the mixture ofprimaryvair and vaporized fuel formed in the pot. and a pilot housing defining and surrounding ing a space-in communication with a plurality of the lower primary air inlet apertures ofthe pot. said housing including generally upright side walls extending inwardly from the pot wall, a top wall, and a front wall, means for delivering liquid fuel to the pot at a point enclosed by said pilot housing, said front wall having an aperture ad jacent its upper edge, said front wail terminating above the closed pot bottom to provide a leakage space between the lower edge ofthe wall and the pot bottom adapted to permit the flow of flame and liquid fuel respectively from the interior of the pilot housing to the interior of the pot, said top wall being generally horizontal and having formed, unitarily therewith, a ring segment extending about the inner face of that part of the pot wall which is exterior to the pilot housing.

3. In combination, an open topped burner pot having a closed bottom, a circumferential wall provided with a plurality of primary air inlet apertures located at various levels in the wall, means for delivering secondary air to the mixture 0i' primary air and vaporized fuel formed in the pot, and a pilot housing defining and surrounding a space in communication with a plurality of the lower primary air inlet apertures of the pot, said housing including generally upright side walls extending inwardly from the pot wall, a top wall, and a front wall, said front wall being generally upright and generally arcuate, means for' delivering liquid fuel to the pot at a point enclosed by said pilot housing, said front wall having an aperture adjacent its upper edge said, front wall terminating above the closed pot bottom to provide aJeakage space between the lower edge of the wall and the not bottom, adapted to permit housing to the interior of the pot.

-tures located at various levels in the wall, means for delivering secondary air to the mixture of priand a pilot housing ,defining and surrounding a space in communication'with a plurality of the lower primary air inlet apertures of the 'pot, said pilot housing including a generally upright side wall structure engaging the pot wall at its ends and a closed top wall, means for deliveringliquid fuel to the pot at a point enclosed by said pilot 'housing and a ring segment connected to said pilot housing and extending about that part of the pot` wall which' is exterior to the pilot housing. ,the pilot housing wall being apertured to provide an outlet from the interior of the pilot 5. In combination. an open top burner pot having a circumferential `side wall provided with a plurality of primary air inlet apertures located at various levels in the wall, a pilot housing within the pot, means for delivering liquid fuel for vaporization to the interior ofthe pilot housing, means for delivering secondary air to the mixture of air and vaporized fuel moving upwardly through the pot, the pilot housing deiining a space in communication with a plurality of zthe lower primary air inlet apertures of the pot, a ring segment connected to the pilot nous-- ing extending about that portion of the pot which is not occupied by the housing and being located above the level of the lowest and below the level of the remainder of the primary air inlets.

6. In combination, 'an open top burner pot having a circumferential side wall provided `with a plurality of primary air inlet apertures located at various levels in the wall, a pilot housing within the pot,'means for delivering liquid fuelfor vaporization to the interior of the pilot housing, means for delivering secondary air to the mixture of air and vaporiaed fuel moving upwardly through the pot, the pilot housing defining a space in communication with a plurality of the lower primary a-ir inlet apertures of the pot, said pilot housing including a pair of converging generally upright side walls extending inwardly from the wall of the pot, a top wall extending across the space between the side walls inwardly from the Wall of the pot and a curved inner wall extending across the space between the inner edges of the side walls and the top wall, one of the walls of the pilot housing being apertured to connect the interior of the housing with the interior of the pot.

' MILTON D. HUSTON.

BRUCE HAYTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

